Suppose that in 2015 there were 400 cell phones sold at a price of $250 each. A…
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Suppose that in 2015 there were 400 cell phones sold at a price of $250 each. And in 2016 there were 450 cell phones sold at a price of $300 each. One possible explanation for this is that from 2015 to 2016 the ________ curve shifted to the _____